PHP Warning: imagecreatefromjpeg()

Question

PHP Warning: Division by zero in /home/u215177984/public_html/classes/Panel.class.php on line 19 PHP Warning: imagecreatetruecolor(): Invalid image Dimensions in /home/u215177984/public_html/classes/Panel.class.php on line 21

I don’t understand! I tested the site before upar and now decided to give one problem after another. I’m no expert, see!

Panel.class.php

public function upload($tmp, $nome, $largura, $pasta){
  $foto = imagecreatefromjpeg($tmp);
  $x = imagesx($foto);
  $y = imagesy($foto);
  $altura = ($largura * $y) / $x;

  $novaimg = imagecreatetruecolor($largura, $altura);
  imagecopyresampled($novaimg, $foto, 0,0,0,0,$largura, $altura, $x, $y);
  imagejpeg($novaimg, "$pasta/$nome");
  imagedestroy($novaimg);
  imagedestroy($foto);
  return ($nome);
}//upload de imagens no painel

Upload.php

<?php
function upload($tmp, $nome, $largura, $pasta){
  $foto = imagecreatefromjpeg($tmp);
  $x = imagesx($foto);
  $y = imagesy($foto);
  $altura = ($largura * $y) / $x;

  $novaimg = imagecreatetruecolor($largura, $altura);
  imagecopyresampled($novaimg, $foto, 0,0,0,0,$largura, $altura, $x, $y);
  imagejpeg($novaimg, "$pasta/$nome");
  imagedestroy($novaimg);
  imagedestroy($foto);
  return ($nome);
}
?>

Home.php

<div id="bloco-um">
    <?php
        foreach($query->selecaoLimit('1') as $post){
    ?>  
            <div id="destaque">
                <a href="<?php echo $base.'/'.$post['categoria'].'/'.$post['slug']; ?>" title="<?php echo $post['titulo']; ?>">
                    <img src="posts/<?php echo $post['exibicao']; ?>" width="350" title="<?php echo $post['titulo']; ?>" alt="" height="170" />
                    <span><?php echo $post['titulo']; ?></span>
                </a>
            </div><!-- destaque -->
    <?php } ?> 

            <div id="outros-destaques">
        <?php
        foreach($query->selecaoLimit('1,3') as $postdois){
        ?>                        
            <div class="outro-destaque">
                <a href="<?php echo $base.'/'.$postdois['categoria'].'/'.$postdois['slug']; ?>" title="<?php echo $postdois['postdois']; ?>">
                <img src="posts/<?php echo $postdois['exibicao']; ?>" title="<?php echo $postdois['postdois']; ?>" border="0" width="110" height="62"  />
                <span><?php echo $postdois['titulo']; ?></span>
                </a>
            </div><!-- outro-destaque -->
        <?php } ?>
            </div><!-- outros-destaques -->


            <div id="tabnav">
                <ul id="tab-nav">
                    <li><a href="#cmt-home">Comentários</a></li>
                    <li><a href="#mais-visualizados">Mais Visualizados</a></li>
                </ul>
            <div id="cmt-home" class="tab">
                <ul>
                <?php
$pegarcomentarios = BD::conn()->prepare("SELECT id_post, nome, LEFT (comentario, 45) AS limitado FROM `comentarios` WHERE status = '1' ORDER BY id DESC LIMIT 5");
                $pegarcomentarios->execute();
                if($pegarcomentarios->rowCount() == 0){
                    echo '<p>Não existem comentários no nosso site</p>';
                }else{
                    $numb = '0';
                    while($coment = $pegarcomentarios->fetchObject()){
                        $numb++;
                    $postCom = BD::conn()->prepare("SELECT * FROM `posts` WHERE id = '".$coment->id_post."'");
                    $postCom->execute();
                    $fetchPost = $postCom->fetchObject();
                ?>
                    <li>
                        <a href="<?php echo $base.'/'.$fetchPost->categoria.'/'.$fetchPost->slug;?>" title="<?php echo $fetchPost->titulo;?>">
                            <span class="numb"><?php echo $numb;?></span>
                            <span class="nam"><?php echo $coment->nome;?></span>
                            <p><?php echo $coment->limitado;?></p>
                        </a>
                    </li>
                <?php }} ?>                    
                </ul>
            </div><!-- comentarios -->

            <div id="mais-visualizados" class="tab">
                <ul>
                <?php
                    $maisvisualizados = BD::conn()->prepare("SELECT * FROM `posts` ORDER BY views DESC LIMIT 5");
                    $maisvisualizados->execute();
                    $num = '0';
                    while($postmais = $maisvisualizados->fetchObject()){
                        $num++;
                        echo '<li><span>'.$num.'</span><a href="'.$base.'/'.$postmais->categoria.'/'.$postmais->slug.'">'.$postmais->titulo.'</a></li>';    
                    }
                ?>
                </ul>
            </div><!-- comentarios -->
            </div><!-- tabnav -->            
        </div><!-- bloco-um -->


        <div id="bloco-dois">        
            <div id="artigos">
                <h1>Últimos Artigos</h1>
                <?php
                    foreach($query->selecaoArtigos('4', 'artigos') as $artigo){
                ?>
                <div class="artigo">
                <a href="<?php echo $base.'/'.$artigo['categoria'].'/'.$artigo['slug']; ?>" title="<?php echo $artigo['titulo']; ?>">
                <img src="posts/<?php echo $artigo['exibicao']; ?>" title="<?php echo $artigo['titulo']; ?>" alt="" border="0" width="110" height="62"  />
                <span><?php echo $artigo['titulo']; ?></span>
                </a>
                </div><!-- artigo -->
                <?php } ?>
            </div><!-- artigos -->  



            <div id="videos">
                <h1>Últimos Vídeos</h1>
                <?php
                $videos = BD::conn()->prepare("SELECT * FROM `videos` ORDER BY id DESC LIMIT 4");
                $videos->execute();
                if($videos->rowCount() == 0){
                }else{
                 while($video = $videos->fetchObject()){
                ?>
                <div class="video">
                <div class="thumb-vid">
                <a href="<?php echo $base;?>/video/<?php echo $video->id;?>" title="<?php echo $video->titulo;?>"><img src="images/play.png" title="<?php echo $video->titulo;?>" alt="" border="0" width="110" height="62" class="play"/></a>
                    <img src="<?php echo $video->thumb;?>" width="110" alt="" height="62" />
                </div>
                <span><?php echo $video->titulo;?></span>
            </div><!-- VIDEO DESTAQUE -->
                <?php }}?>                
             </div><!-- videos -->
        </div><!-- bloco-dois -->

<!-------------------- BLOCO TRES ULTIMO BLOCO ----------------------------->

    <div id="bloco-tres">
    <h1>Outros Posts</h1>
    <?php
        foreach($query->selecaoLimit('4,5') as $outros){
    ?>
    <div class="outro">
        <a href="<?php echo $base.'/'.$outros['categoria'].'/'.$outros['slug'];?>" title="<?php echo $outros['titulo'];?>">
            <img src="posts/<?php echo $outros['exibicao'];?>" width="190" height="108" border="0"/>
            <span><?php echo $outros['titulo'];?></span>
            <p><?php echo html_entity_decode($query->limitar($outros['conteudo'],50));?></p>
        </a>
    </div><!-- outro -->
   <?php }?>
</div><!-- termina bloco tres -->

Answer 1

The first error concerns a division by 0

PHP Warning: Division by zero in ...

The second error concerns an invalid dimension in the function imagecreatetruecolor() since the variable $altura problem with the first error "division by 0"

Warning: imagecreatetruecolor(): Invalid image Dimensions in...